String equals with multiple conditions and one action on result

Question

Is it possible to do something like this in Java for Android  this is a pseudo code   IF  some string equals  john  OR  mary  OR  peter  OR  etc        THEN do something        At the moment this is done via multiple String equals   condition with    among them

User · Answer

Keep the acceptable values in a HashSet and check if your string exists using the contains method   Set lt String gt  accept   new HashSet lt String gt  Arrays asList new String     john    mary    peter      if  accept contains some string

User · Answer

If you develop for Android KitKat or newer  you could also use a switch statement  see  Android coding with switch  String    e g   switch yourString         case  john               do something for john      case  mary               do something for mary

User · Answer

Pattern p   Pattern compile  tom      the regular-expression pattern Matcher m   p matcher   bob  tom  harry       The data to find matches with  while  m find            do something           Use regex to find a match maybe       Or create an array   String   a   new String             tom            bob            harry        if a contains stringtomatch           do something

User · Answer

No its check like if string is  john  OR  mary  OR  peter  OR  etc    you should check using     Like   if str equals  john      str equals  mary      str equals  peter

User · Answer

Your current implementation is correct  The suggested is not possible but the pseudo code would be implemented with multiple equal   calls and

User · Answer

if  Arrays asList  John    Mary    Peter   contains name          This is not as fast as using a prepared Set  but it performs no worse than using OR  This doesn t crash when name is NULL  same with Set   I like it because it looks clean

User · Answer

Possibilities    Use String equals     if  some string equals  john          some string equals  mary          some string equals  peter         Use a regular expression   if  some string matches  john mary peter         Store a list of strings to be matched against in a Collection and search the collection   Set lt String gt  names   new HashSet lt String gt     names add  john    names add  mary    names add  peter     if  names contains some string

[java] String.equals() with multiple conditions (and one action on result)

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